Dot sourcing a PowerShell script not ending with .ps1

Question

From a PowerShell program, I can "dot source" another PowerShell program. i.e I can execute it as if it were written inside the first one.
Example:

Write-Host 'before'
. MyOtherProgram.ps1
Write-Host 'after'

MyOtherProgram in 'included' inside the main program, exactly as if its content had been copy/pasted.

The problem is: I can only dot source a filename finishing with .ps1
I can't with MyOtherProgram.lib or MyOtherProgram.whatever

Anyone have a method to dot source a PowerShell script not ending with .ps1 ?

Answer 1

Another way would be using Invoke-Expression:

$code = Get-Content ./MyOtherProgram.lib | Out-String
Invoke-Expression $code